Conveyors: power-driven – Conveyor or accessory therefor specialized to convey people – By stairway having steps forming an endless member
Patent
1984-06-29
1985-12-10
Valenza, Joseph E.
Conveyors: power-driven
Conveyor or accessory therefor specialized to convey people
By stairway having steps forming an endless member
198321, B65G 912, B65G 1700
Patent
active
045573697
ABSTRACT:
A moving staircase is disclosed wherein along the circulating path of a number of conventional tread boards thereof which are articulated together in an endless fashion at least one pair of specifically constituted tread boards are disposed between any two conventional tread boards so as to be articulated thereto. The specifically constituted tread boards each have substantially the same configuration as that of the conventional tread board and are articulated one behind the other in the circulating direction of the conventional tread boards. The rear one is provided with a movable footboard so as to be moved up and down relative thereto, the movable footboard being adapted to be normally locked to the rear one of the specifically constituted tread boards by a lock means provided therein. When required, the movable footboard is made free to move by the release of the lock means and is supported by the front one of the specifically constituted tread boards through forks or bars which are provided in the front one so as not to normally interfere with the movement of the rear one. When the lock means of the rear one is released, the forks or bars are simultaneously protruded toward the rear one to support its footboard, and the footboard is moved together with the front one of the specifically constituted tread boards with their upper surfaces being flush with each other.
REFERENCES:
patent: 4326622 (1982-04-01), Ellzey
Asano Masaru
Goto Shigeru
Ishida Matsuhiko
Sakurai Takeshi
Mitsubishi Denki & Kabushiki Kaisha
Stone Michael
Valenza Joseph E.
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